[base] Define CHECK comparison for signed vs. unsigned

src/log-utils.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_LOG_UTILS_H_
 #define V8_LOG_UTILS_H_
 
 #include <stdio.h>
 
 #include <cstdarg>
@@ skipping 92 matching lines @@
   void OpenStdout();
 
   // Opens file for logging.
   void OpenFile(const char* name);
 
   // Opens a temporary file for logging.
   void OpenTemporaryFile();
 
   // Implementation of writing to a log file.
   int WriteToFile(const char* msg, int length) {
-    DCHECK(output_handle_ != NULL);
+    DCHECK_NOT_NULL(output_handle_);
     size_t rv = fwrite(msg, 1, length, output_handle_);
-    DCHECK(static_cast<size_t>(length) == rv);
+    DCHECK_EQ(length, rv);
     USE(rv);
     fflush(output_handle_);
     return length;
   }
 
   // Whether logging is stopped (e.g. due to insufficient resources).
   bool is_stopped_;
 
   // When logging is active output_handle_ is used to store a pointer to log
   // destination.  mutex_ should be acquired before using output_handle_.
@@ skipping 10 matching lines @@
   Logger* logger_;
 
   friend class Logger;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_LOG_UTILS_H_